A force of 8 N is used to drag a chair 2.5 metres across a room. Calculate the work done to move the chair.

Work is measured in Joule.  The work done by the given chair is 20 J.

Work:

It is defined as the amount change in the energy. It is the product of force applied and displacement due to force.

Formula for work,

W = F x d

Where,

F - Force applied = 8 N  

d - Distance = 2.5 meters  

W - Work done = ?

Put the values in the formula,

Therefore, the work done by the given chair is 20 J.

To know more about work,

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Explanation:

GIVEN

Force (F) = 8 N

Distance (d) = 2.5 metres

Work done = ?

WE know we have the formula

work done = F * d

Work done = 8 * 2.5

                   = 20 Joule

Hope it helps :)

diagram is missing, but i will try to explain your doubt.

answer:

amplitude is the maximum displacement or distance moved on a point of a vibrating body or wave measured from its equilibrium position.it is equal to half the length of vibration path.